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arxiv: cond-mat/0209267 · v3 · submitted 2002-09-11 · ❄️ cond-mat.str-el

Co-doped LaLa1-xSrxTiO3-d : A Diluted Magnetic Oxide System with High Curie Temperature

Y. G. Zhao , S. R. Shinde , S. B. Ogale , J. Higgins , S. E. Lofland , C. Lanci , J. P. Buban , N. D. Browning
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S. Das Sarma A. J. Millis V.N. Kulkarni R. J. Choudhary R. L. Greene T. Venkatesan
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classification ❄️ cond-mat.str-el
keywords co-dopedconcentrationsdilutedfilmsmagneticoxidesystemtemperature
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Ferromagnetism is observed at and above room temperature in pulsed laser deposited epitaxial films of Co-doped Ti-based oxide perovskite (La1-xSrxTiO3-d). The system has the characteristics of an intrinsic diluted magnetic semiconductor (metal) at low concentrations (<~ 2 %), but develops inhomogeneity at higher cobalt concentrations. The films range from being opaque metallic to transparent semiconducting depending on the oxygen pressure during growth and are yet ferromagnetic.

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